Emission spectra

For an electron to change from ground state to an excited stated it must...

• Absorb energy
• Release energy

Line emission spectrum shown below happens when

• Electron transition from lower to higher energy level.
• Electron transition from higher to lower energy level.
• Electron exist in fixed energy states
• Electron transition between different energy levels.

Emission of light from an atom occurs when an electron

• drops from a higher to a lower energy level.
•    jumps from a lower to a higher energy level.   
•    moves within its atomic orbital.
• falls into the nucleus.

Why are line emission spectra of elements called "atomic fingerprints"?

• They are all the same
• They are all unique
• They are all similar
• They all contain colored light

If an electron moves from n=4 to n=2 it ____

• absorbs energy

• releases energy

Which EM waves have the longest wavelength?

• radio

• x-rays

• ultraviolet

• gamma rays

What subatomic particle is responsible for the spectral lines seen in emission spectra diagrams? (a)  

• electrons
• protons
• neutrons

In which state does an electron have the least amount of energy?

• Excited state

• Ground state

• Orbital

• Bohr model

What causes an electron to leave its ground state and jump to an excited state?

• Absorption of a photon

• emission of a photon

• absorption of an electron

• Emission of an electron

A transition from a higher energy level into n=1 emits what type of light?

• UV Radiation

• Infrared Radiation

• Visible Light

• X-Rays